If you would you like to find open Ports of SQL Server how I did, this tool is very useful for this purpose
quy
PortQueryUI has a number of the predefined set of queries to check the availability of the popular Microsoft services:

  • Domain and trusts
  • Exchange Server
  • SQL Server
  • Networking
  • IP Sec
  • Web Server
  • Net Meeting

as I said, usually use SQL Server query to check SQL server open ports, but it can also do other queries, for more details visit this site

Download PortQryUI here.